Spade lug for tractor wheels



March'9 1926. 1,5763% L. A. "rut-mm SPADE' LUG FOR TRACTDR WHEELSFilac'i August 11, 1924 Patented Mar. 9, 1926.

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LEONARD TURNER, OF SANTA ANA, CALIFGRNIA.

SPADE LUG FOR TRACTOR WHEELS.

Application filed August 11, 1924. Serial No. 731,443.

To all whom it may concern:

Be it known that I, LEONARD A. TURNER, a citizen of the United States,residing at Santa Ana, in the county of Orange and State of California,have invented new and useful Improvements in Spade Lugs for TractorWheels, of which the following is a specification.

This invention relates to improvements in spade lugs for tractor wheels.

It is an object of the invention to provide an improved traction deviceadapted to be secured upon the periphery of the tractor wheel.

Another object of the invention is to provide an improved device for theabove stated purpose which has an adjustable shoe or ground engagingmember, such that the shoe may be adjusted with respect to the rim ofthe tractor wheel to take up wear.

Another object of the invention is to provide a traction device whichhas an adjustable shoe to take up wear and which shoe is capable ofbeing reversed so that when one side of the shoe is worn, the other sidemay be employed as the ground engaging portion, thereby prolonging thelife of each shoe.

A still further object of the invention is to provide an adjustable shoeof such shape that sticky or damp soil will not have a tendency tocollect upon the face or rim of.

the wheel as has been experienced upon prior devices of this character.

Still further objects reside in forming a traction device attachable toa tractor wheel which is made of two pieces, one of which consists ofthe wearing shoe which is relatively simple and inexpensive, thereby providing cheap replacement. Also, it is an ob ject to provide the adjustable shoe ofthe device with a. line adjustment so that the shoe maybe adjusted relatively to the wheel suitable to various soil conditions.

lVith the foregoing and other objects in 'iew which will be pointed outin the following detailed description and defined in the appendedclaims, reference is had to the accompanying drawing for an illustrativeembodiment of the invention in its preferred form, wherein- Fig. 1, is apartial side elevation of a portion of a tractor wheel upon which theimproved traction device is mounted.

Fig. 2, is a section taken through Fig. 1, substantially on the line 2-2thereof.

Fig. 3, is a section also taken through Fi 1, substantially upon theline 33 thereof.

F lg. d, is a vertical section taken through Fig. 2, substantially ontheline 4'-f, the

ground engag ng shoe being originally applied.

Fig. '5, is a .I v 1 ground engaging shoe oemg shown as to Fig. 4, theshown as havsimilar View the mounting or supporting member of the,

device.

Fig. 9, is a perspective View of the ground engaging shoe.

Fig. 10, is a section taken substantially on the line 10-- 10 of Figure9.

Referring to the accompanying drawing where n similar referencecharacters des1gnate similar parts throughout, the device in itspreferred mounting member somewhat L shaped in embodiment consists of across section, which consists of a bottom 10, adapted to be secured tothe rim 11, of a tractor wheel by means of bolts 12, extendingtherethru.

The mounting member 10,

is preferably a single casting which may be of cast lron, cast steel, orforged steel and has lntegral with the bottom 10, an ino'lzned face 13,and somewhat triangular shaped sides 14 and 15, joining the inclinedface 13,, with the bottom 10. As clearly shown in Fig. 2, the base 10,has a flange or lip 16,

beneath one of the sides which is adapted to extend over the edge of therim or face of the wheel 11, and snugly bear thereagainst.

The'inolined face 13, has a slot or elongated opening 17, through whichis adaptedto pass-the shank of the bolt 18.

series of projecting teeth 19, project from the front face of theinclined face 13.

The head 20, of the bolt 18, is receivedwithin a socket 21, of theground engaging shoe 22, which shoe has upon its rear face a series ofteeth 23, adapted to interlit with the teeth 19. A nut 24:, which bearsagainst a lock washer 25, serves to tighten the bolt 18, and hold theground engaging shoe 22, with its teeth 23, in interfitting engagementwith the teeth 19.

The ground engaging shoe 22, has a pair of side flanges 26,'which areadapted to 15.

bear against the sides 14 and Adjustment for the device is provided byunscrewing the nut 24:, so that the teeth 23, of the ground engagingshoe 22, may slide over the teeth 19, so that as the upper edge of theshoe 22, as shown in Fig. 4, becomes worn, the shoe may be raised one ormor tcethat a time and clamped in such position by means of the bolt 18.

T his adjustment may be made either when the shoe becomes worn or uponusingthe tractor upon very soft ground where a longer or deeper tractiondevice is desired.

he bolt 18, is slid-able within the slot 17, and in Fig. 5, the shoe isshown as having been worn and raised into its uppermost position withthe bolt 18, engaging the up per surface of the slot- 17. In Fig. 6, theshoe 22, is shown as having been reversed after one-half of the shoe hasbeen worn I off, so thatthe opposite or unused half may be worn beforereplacement of the shoe is necessary.

As clearly shown in Fig. 10, the shoe 22, has its exposed facetransversely curved which has been found by experiment will provide asurface, because of its curvature will not have the tendency to allowmud orv sticky soil to cake and collect thereon.

From the above, it is seen that I have provided a traction device fortractor wheels, having a mounting member provided with an inclined face,teeth arranged upon the inclined face and a shoe which is adjustableupon the edge of the tractor wheel and an adjustable shoe secured uponsaid mounting member.

2. A traction device for tractor wheels, comprising a mountingmemberadapted. to

be secured upon the rim of a tractor wheel,

said mounting member having an inclined face and a shoeadju'stablysecured against the inclined face of said mounting member.

3. A traction device for tractor wheels, comprisin a mounting memberattachable to the rim of a tractor wheel, said mounting member hai' inga flat face, teeth arranged upon said flat face and an adjustable shoehaving teeth'adapted to interfit with the teeth upon the mountingmember, said shoe being removably secured to said mounting member.

i. A traction device for tractor wheels, comprising a mounting memberadapted to be secured to the rim of a tractor wheel, said mountingmember having an inclined face, teeth formed uponsaid face, a shoehaving teeth adapted to interfit with the teeth upon said mountingmember, said shoe being removably secured to said mounting member.

5. A traction device for tractor wheels, comprising a mounting memberadapted to be secured to a tractorwheel, said mounting member having aninclined flatface, teeth arranged upon the flat face of said mountingmember, a shoe having teeth adapted to interfit'with the teeth upon saidmounting member, said shoe having lateral flanges adapted to bearagainst the sides of the mounting member, and means for removablyandadjustably securing said shoe upon said inclined face.

6. A traction device for tractor wheels, comprising a mounting memberattachable to the rim of a tractor wheehsaid mounting member having alateral flange adapted to engage the edge of said rim, an inclined faceformed upon said mounting member andhaving teeth, a reversible shoehaving teeth adapted to interfit with the teeth of said inclined face,and means for adjustably and removably' securing said shoe upon saidmounting member, said shoe having its exposed face transversely curved.

1 7. In a tract-ion device for tractors, a removable shoe havinga'transversely curved exposed face, and a lateral bearing flange at eachside thereof.

8. A traction device for tractor wheels comprising a mounting memberadapted to be mounted upon the exterior peripheral surface, of a tractorwheel, said mounting member having a plurality of teeth formed thereon,a shoe havingcomplementary teeth formed thereon, and means for securingsaid shoe to said mounting member.

9. A removable shoe for traction devices for tractor wieels having aplurality of transverse teeth formed upon its under side, and a lateralbearing flange at each side thereof.

,In testimony whereof I have signed my name to this specification.

LEONARD TURNER.

